Calculate speed in cm/s from distance and time, convert between metric and imperial units, or find distance or time with matching speed units.
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Cm Per Second Formula
The calculator uses one core formula and rearranges it based on which value you need.
- v = speed in centimeters per second (cm/s)
- d = distance in centimeters (cm)
- t = time in seconds (s)
Rearranged forms:
For unit conversion the calculator multiplies the input speed by a fixed factor to reach cm/s:
The four calculator modes work like this:
- Speed from distance and time: converts your distance to cm and your time to seconds, then divides.
- Convert Speed: applies the conversion factor for the selected unit to return cm/s.
- Distance from speed and time: solves for distance using v ร t.
- Time from distance and speed: solves for time using d รท v.
Reference Tables
Use this table to convert between cm/s and other common speed units.
| From | To cm/s | Multiply by (rounded where needed) |
|---|---|---|
| m/s | cm/s | 100 |
| km/h | cm/s | 27.7778 |
| mph | cm/s | 44.704 |
| ft/s | cm/s | 30.48 |
| knots | cm/s | 51.4444 |
| mm/s | cm/s | 0.1 |
Illustrative speeds expressed in cm/s; these are example assumptions, not biological or population benchmarks:
| Motion | Approx. cm/s |
|---|---|
| Example at 0.01 m/s | 1 |
| Example at 0.05 m/s | 5 |
| Example at 1.4 m/s | 140 |
| Example at 1.7 m/s | 170 |
| Example at 5 m/s | 500 |
| Car at 60 km/h | 1,667 |
| Car at 60 mph | 2,682 |
Example Problems
Example 1. A toy car travels 240 cm in 4 seconds.
v = 240 รท 4 = 60 cm/s.
Example 2. A conveyor belt moves at 25 cm/s. How far does it travel in 2 minutes?
Convert time: 2 min = 120 s. Then d = 25 ร 120 = 3,000 cm, or 30 m.
FAQ
How do you convert m/s to cm/s? Multiply by 100. So 3 m/s = 300 cm/s.
How do you convert km/h to cm/s? Multiply by 100/3.6 (about 27.7778). A speed of 1 km/h equals about 27.78 cm/s.
Is cm/s an SI unit? Yes. cm/s uses an SI-prefixed meter and the SI second. The coherent SI derived unit for speed is m/s; 1 cm/s = 0.01 m/s.
What is a normal walking speed in cm/s? Walking speed varies. An illustrative speed of 1.4 m/s converts to 140 cm/s; it is not a universal normal value.
